package core.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class CharacterEncodingFilter implements Filter {
	private static final String ENCODE_KEY = "encode";
	private String encode="UTF-8";
	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		if (request.getCharacterEncoding() == null) {
			request.setCharacterEncoding(encode);
		}
		response.setCharacterEncoding(encode); 
		response.setContentType("text/html;charset=UTF-8"); 
		chain.doFilter(request, response);
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		String encodev = config.getInitParameter(ENCODE_KEY);
		if(encodev!=null){
			encode = encodev;
		}
	}

}
